Experimental study of hypervapotron under conditions of high heat flux

In the light of the needs to develop high-performance heat transfer component for nation-level large-scale scientific projects of China, a hypervapotron experimental platform with supply of heat flux 1–10 MW m−2 was established. With this platform, the multiphase flow and heat transfer phenomena on the surface of triangular fin when the subcooled water flowed through were observed and measured with the planar laser induced fluorescence (PLIF) and high-speed photography techniques. The temperature contour on the slice plane of fin symmetry was measured and the heat flux contour was processed based on gradient computation. It is confirmed that: 1) PLIF with high-speed photography is very powerful technique to investigate the multiphase flow of hypervapotron quantitatively; 2) evaporation is the primary way in heat transfer mechanism of hypervapotron flow under the condition of high heat flux. The techniques and results obtained will provide useful reference in the R&D of hypervapotron technology in China.